> For the complete documentation index, see [llms.txt](https://strainz420.gitbook.io/strainz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://strainz420.gitbook.io/strainz/fundamentals/breeding.md).

# Breeding

### Breed

Similar to CryptoKitties, you can breed two *STRAINZ* NFTs together to get a third new *STRAINZ* NFT, with a different appearance.

![Breeding NFTs](https://cdn-images-1.medium.com/max/800/0*g6BRq8dHyVv2RFz5.png)

For breeding you have to burn *STRAINZ* Tokens, corresponding to the breeding cost. Each plant has its own breeding cost, which depends on its grow rate.

After breeding, the breeding costs of both parents get more expensive, so it will get more and more difficult to produce new *STRAINZ*. The child plant will have a grow rate dependent on its parent but reduced by a proportional value (-25%). Therefore, each newly generated plant will have a lower grow rate value than the average of its parents.

You always need to pay the average breeding cost of both parents.

{% hint style="info" %}
Breeding Cost => (numberOfBreeds + 1) \* growrate \* 20\
\
This essentially means each plant will generate enough *STRAINZ* to breed every 20 weeks
{% endhint %}

To start breeding, select your preferred first parent on your wallet page and click on "Breed":

![Strainz Wallet interface](/files/oYn56CvwrN2XRoRFyWtI)

Next, select your second parent from the breeding list. You can see a preview of the breeding costs which you need to burn.

![](/files/hV4Qq3Dh7B9MG4p28kx9)

Click on "Approve" and then on "Breed" and confirm both transactions in Metamask.

{% hint style="success" %}
Congrats! A new STRAIN is born💪
{% endhint %}